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本文对于静电聚焦像管管型的进化、工作原理和设计方法作了评述。等直径的同轴双圆筒,即为最简单的二极定焦型系统,但其长度以及轴外的各种像差都很大。改进的方法是采用球面阴极和较小直径的阳极筒;也可以基于双同心球模型进一步优化设计,这就构成实用的管型(例如6914、6929型红外变像管,××1050第一代微光管)。在二极像管的阴极和阳极之间再加入一个电极,可构成具有调焦或调制功能的三极管。大倍率的像管(如5×Owleye型管),必须使用调焦电极;中间调制极与脉冲电源相接的三极管,可用于高速摄影或距离选通系统。某些像管要求减小
This article reviews the evolution, working principle and design method of electrostatic focus tube. Equal diameter coaxial double cylinder, is the simplest two-pole focusing system, but its length and all kinds of aberrations outside the shaft are very large. The improved method is the use of a spherical cathode and a smaller diameter anode cylinder; it is also possible to further optimize the design based on the double concentric sphere model, which constitutes a practical tube type (eg IR tube type 6914, 6929, Light tube). An additional electrode between the cathode and the anode of the diode can form a triode with focus or modulation. Large magnification tube (such as 5 × Owleye tube), you must use the focus electrode; intermediate modulation and pulse power supply connected transistor, can be used for high-speed photography or distance gating system. Some tube like requirements decrease